Heat exchange device

Abstract

A heat exchange device has a plate stack unit obtained by continuous stacking of a plurality of plates. This plate stack unit includes a condenser unit, an evaporator unit, and an internal heat exchange unit. The condenser unit is configured such that a passage for allowing a high pressure refrigerant to flow, and a passage for a heat medium for absorbing heat from the high pressure refrigerant are stacked between a set of plates among the plurality of plates. The evaporator unit is configured such that a passage for allowing a low pressure refrigerant to flow, and a passage for a heat medium for applying heat to the low pressure refrigerant are stacked between a set of plates among the plurality of plates. The internal heat exchange unit is configured such that a passage for allowing the high pressure refrigerant to flow, and a passage for allowing the low pressure refrigerant to flow are stacked between a set of plates among the plurality of plates.

What is claimed is: 
     
         1 . A heat exchange device comprising a plate stack unit configured by a plurality of plates which are continuously stacked,
 wherein the plate stack unit has:
 a condenser unit configured such that a passage for allowing a high pressure refrigerant to flow, and a passage for a heat medium for absorbing heat from the high pressure refrigerant are stacked between first set of plates among the plurality of plates; 
 an evaporator unit configured such that a passage for allowing a low pressure refrigerant to flow, and a passage for a heat medium for applying heat to the low pressure refrigerant are stacked between second set of plates among the plurality of plates; and 
 an internal heat exchange unit configured such that a passage for allowing the high pressure refrigerant to flow, and a passage for allowing the low pressure refrigerant to flow are stacked between third set of plates among the plurality of plates. 
   
     
     
         2 . The heat exchange device according to  claim 1 , wherein
 the condenser unit, the internal heat exchange unit, and the evaporator unit are arrayed in order of the condenser unit, the internal heat exchange unit, and the evaporator unit.   
     
     
         3 . The heat exchange device according to  claim 1 , further comprising a liquid tank unit provided with a space leading to an outlet of the high pressure refrigerant of the condenser unit, between fourth set of plates among the plurality of plates or through the fourth set of plates among the plurality of plates. 
     
     
         4 . The heat exchange device according to  claim 3 , wherein
 the condenser unit, the liquid tank unit, the internal heat exchange unit, and the evaporator unit are arrayed in order of the condenser unit, the liquid tank unit, the internal heat exchange unit, and the evaporator unit.   
     
     
         5 . The heat exchange device according to  claim 1 , wherein
 the heat medium is any of a coolant, oil, and air.   
     
     
         6 . The heat exchange device according to  claim 1 , wherein
 the plurality of plates are identical in size and in outer shape.